I wonder if the media around BTC being anonymous and untraceable was actually encouraged by the intelligence community and law enforcement. It's certainly been a boon for tracking down a lot of criminals.
I don't think it's likely true but it's an entertaining gedanken experiment.
I have never heard a convincing argument for your quote and would like everyone to at least consider malice when the situation warrants it. Maybe "follow the money" would be an equally valid, but contradictory heuristic to deal with unclear situations.